| 摘要 |
PROBLEM TO BE SOLVED: To convert the operation correcting amount according to the displacement amount of an edge in the diameter direction of a face plate, without storing the operation correcting amounts of all the processing sizes beforehand. SOLUTION: By driving to rotate a face plate at a processing standard rotation frequency n in the condition positioning a cutting tool at a processing standard rotation radius r, a processing standard cutting speed v is maintained, and when a work is cut at the processing standard cutting speed v, a standard displacement amountΔr of the edge of the cutting tool to the processing standard rotation radius r which is generated by the centrifugal force F is found as a rule of thumb, and in the condition maintaining the processing standard rotation frequency n in a cutting processing condition, the actual displacement amountΔra of the cutting tool at the set processing rotation radius ra is found as:Δra=(ra/r)Δr, and the set processing rotation radius ra is corrected by using the found actual displacement amountΔra, as a correcting value.
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